Dynamics of State-Selected Ion/Surface Reactions

状态选择离子/表面反应的动力学

• 批准号: 9986374
• 负责人: Dennis Jacobs
• 金额: $ 36.64万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-03-01 至 2006-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9986374&HistoricalAwards=false
• 关键词: Dynamics; State; Selected; Ion; Surface

The detailed mechanism of the interaction of state-selected ions with solid surfaces is the focus of this research project supported by the Analytical and Surface Chemistry Program. Professor Dennis Jacobs and his colleagues at the University of Notre Dame use state-selected scattering of ion beams from well characterized surfaces, coupled with state-specific detection of the scattered ion products, to determine the microscopic mechanisms of ion-surface interactions. Mechanisms of charge transfer, ion fragmentation, and atom abstraction during the surface collision are addressed. The dissociative neutralization of hydrogen molecule ion colliding with Al(111), the interactions of HBr+ with the Si(100) surface, and alkali-atom abstraction in the collision of NH3+ with alkali dosed metal surfaces are the specific systems chosen for study. Information from these studies is useful in understanding reactive ion etching, atmospheric ion chemistry, and spacecraft dynamics.In order to develop a complete understanding of the interaction of ions with surfaces, detailed state specific dynamic information is needed. This research project, supported in the Analytical and Surface Chemistry Program, focusses on obtaining this sort of information. The fundamental research carried out in Professor Jacobs' laboratory at Notre Dame, addresses the microscopic mechanisms of charge exchange, fragmentation, and atom abstraction when ions collide with surfaces. This information is useful in applications ranging from semiconductor processing to sattelite dynamics.

态选择离子与固体表面相互作用的详细机制是本研究项目的重点，该研究项目由分析和表面化学计划支持。 美国圣母大学的Dennis Jacobs教授和他的同事们使用来自良好表征表面的离子束的状态选择散射，再加上散射离子产物的状态特异性检测，来确定离子-表面相互作用的微观机制。 电荷转移，离子碎片化，原子抽象的机制在表面碰撞处理。 氢分子离子与Al（111）碰撞的解离中和作用、HBr+与Si（100）表面的相互作用以及NH3+与碱金属表面碰撞中的碱原子夺取作用是研究的具体体系。 从这些研究中获得的信息有助于理解反应离子蚀刻、大气离子化学和航天器动力学。为了全面了解离子与表面的相互作用，需要详细的状态特定的动力学信息。 这个研究项目，在分析和表面化学计划的支持下，重点是获得这类信息。 圣母大学雅各布斯教授实验室进行的基础研究解决了离子与表面碰撞时电荷交换、碎裂和原子提取的微观机制。 这些信息在从半导体加工到卫星动力学的应用中是有用的。